hackport-0.5.1: cabal/cabal-install/Distribution/Client/ProjectConfig.hs
{-# LANGUAGE CPP, RecordWildCards, NamedFieldPuns, DeriveDataTypeable #-}
-- | Handling project configuration.
--
module Distribution.Client.ProjectConfig (
-- * Types for project config
ProjectConfig(..),
ProjectConfigBuildOnly(..),
ProjectConfigShared(..),
ProjectConfigProvenance(..),
PackageConfig(..),
MapLast(..),
MapMappend(..),
-- * Project config files
findProjectRoot,
readProjectConfig,
writeProjectLocalExtraConfig,
writeProjectLocalFreezeConfig,
writeProjectConfigFile,
commandLineFlagsToProjectConfig,
-- * Packages within projects
ProjectPackageLocation(..),
BadPackageLocations(..),
BadPackageLocation(..),
BadPackageLocationMatch(..),
findProjectPackages,
readSourcePackage,
-- * Resolving configuration
lookupLocalPackageConfig,
projectConfigWithBuilderRepoContext,
projectConfigWithSolverRepoContext,
SolverSettings(..),
resolveSolverSettings,
BuildTimeSettings(..),
resolveBuildTimeSettings,
-- * Checking configuration
checkBadPerPackageCompilerPaths,
BadPerPackageCompilerPaths(..)
) where
import Prelude ()
import Distribution.Client.Compat.Prelude
import Distribution.Client.ProjectConfig.Types
import Distribution.Client.ProjectConfig.Legacy
import Distribution.Client.RebuildMonad
import Distribution.Client.Glob
( isTrivialFilePathGlob )
import Distribution.Client.Types
import Distribution.Client.DistDirLayout
( CabalDirLayout(..) )
import Distribution.Client.GlobalFlags
( RepoContext(..), withRepoContext' )
import Distribution.Client.BuildReports.Types
( ReportLevel(..) )
import Distribution.Client.Config
( loadConfig, defaultConfigFile )
import Distribution.Client.IndexUtils.Timestamp
( IndexState(..) )
import Distribution.Solver.Types.SourcePackage
import Distribution.Solver.Types.Settings
import Distribution.Package
( PackageName, PackageId, packageId, UnitId, Dependency )
import Distribution.System
( Platform )
import Distribution.PackageDescription
( SourceRepo(..) )
import Distribution.PackageDescription.Parse
( readPackageDescription )
import Distribution.Simple.Compiler
( Compiler, compilerInfo )
import Distribution.Simple.Program
( ConfiguredProgram(..) )
import Distribution.Simple.Setup
( Flag(Flag), toFlag, flagToMaybe, flagToList
, fromFlag, fromFlagOrDefault, AllowNewer(..), AllowOlder(..), RelaxDeps(..) )
import Distribution.Client.Setup
( defaultSolver, defaultMaxBackjumps, )
import Distribution.Simple.InstallDirs
( PathTemplate, fromPathTemplate
, toPathTemplate, substPathTemplate, initialPathTemplateEnv )
import Distribution.Simple.Utils
( die, warn )
import Distribution.Client.Utils
( determineNumJobs )
import Distribution.Utils.NubList
( fromNubList )
import Distribution.Verbosity
( Verbosity, verbose )
import Distribution.Text
import Distribution.ParseUtils
( ParseResult(..), locatedErrorMsg, showPWarning )
import Control.Monad
import Control.Monad.Trans (liftIO)
import Control.Exception
import Data.Maybe
import Data.Either
import qualified Data.Map as Map
import Data.Set (Set)
import qualified Data.Set as Set
import System.FilePath hiding (combine)
import System.Directory
import Network.URI (URI(..), URIAuth(..), parseAbsoluteURI)
----------------------------------------
-- Resolving configuration to settings
--
-- | Look up a 'PackageConfig' field in the 'ProjectConfig' for a specific
-- 'PackageName'. This returns the configuration that applies to all local
-- packages plus any package-specific configuration for this package.
--
lookupLocalPackageConfig :: (Semigroup a, Monoid a)
=> (PackageConfig -> a)
-> ProjectConfig
-> PackageName -> a
lookupLocalPackageConfig field ProjectConfig {
projectConfigLocalPackages,
projectConfigSpecificPackage
} pkgname =
field projectConfigLocalPackages
<> maybe mempty field
(Map.lookup pkgname (getMapMappend projectConfigSpecificPackage))
-- | Use a 'RepoContext' based on the 'BuildTimeSettings'.
--
projectConfigWithBuilderRepoContext :: Verbosity
-> BuildTimeSettings
-> (RepoContext -> IO a) -> IO a
projectConfigWithBuilderRepoContext verbosity BuildTimeSettings{..} =
withRepoContext'
verbosity
buildSettingRemoteRepos
buildSettingLocalRepos
buildSettingCacheDir
buildSettingHttpTransport
(Just buildSettingIgnoreExpiry)
-- | Use a 'RepoContext', but only for the solver. The solver does not use the
-- full facilities of the 'RepoContext' so we can get away with making one
-- that doesn't have an http transport. And that avoids having to have access
-- to the 'BuildTimeSettings'
--
projectConfigWithSolverRepoContext :: Verbosity
-> ProjectConfigShared
-> ProjectConfigBuildOnly
-> (RepoContext -> IO a) -> IO a
projectConfigWithSolverRepoContext verbosity
ProjectConfigShared{..}
ProjectConfigBuildOnly{..} =
withRepoContext'
verbosity
(fromNubList projectConfigRemoteRepos)
(fromNubList projectConfigLocalRepos)
(fromFlagOrDefault (error "projectConfigWithSolverRepoContext: projectConfigCacheDir")
projectConfigCacheDir)
(flagToMaybe projectConfigHttpTransport)
(flagToMaybe projectConfigIgnoreExpiry)
-- | Resolve the project configuration, with all its optional fields, into
-- 'SolverSettings' with no optional fields (by applying defaults).
--
resolveSolverSettings :: ProjectConfig -> SolverSettings
resolveSolverSettings ProjectConfig{
projectConfigShared,
projectConfigLocalPackages,
projectConfigSpecificPackage
} =
SolverSettings {..}
where
--TODO: [required eventually] some of these settings need validation, e.g.
-- the flag assignments need checking.
solverSettingRemoteRepos = fromNubList projectConfigRemoteRepos
solverSettingLocalRepos = fromNubList projectConfigLocalRepos
solverSettingConstraints = projectConfigConstraints
solverSettingPreferences = projectConfigPreferences
solverSettingFlagAssignment = packageConfigFlagAssignment projectConfigLocalPackages
solverSettingFlagAssignments = fmap packageConfigFlagAssignment
(getMapMappend projectConfigSpecificPackage)
solverSettingCabalVersion = flagToMaybe projectConfigCabalVersion
solverSettingSolver = fromFlag projectConfigSolver
solverSettingAllowOlder = fromJust projectConfigAllowOlder
solverSettingAllowNewer = fromJust projectConfigAllowNewer
solverSettingMaxBackjumps = case fromFlag projectConfigMaxBackjumps of
n | n < 0 -> Nothing
| otherwise -> Just n
solverSettingReorderGoals = fromFlag projectConfigReorderGoals
solverSettingCountConflicts = fromFlag projectConfigCountConflicts
solverSettingStrongFlags = fromFlag projectConfigStrongFlags
solverSettingIndexState = fromFlagOrDefault IndexStateHead projectConfigIndexState
--solverSettingIndependentGoals = fromFlag projectConfigIndependentGoals
--solverSettingShadowPkgs = fromFlag projectConfigShadowPkgs
--solverSettingReinstall = fromFlag projectConfigReinstall
--solverSettingAvoidReinstalls = fromFlag projectConfigAvoidReinstalls
--solverSettingOverrideReinstall = fromFlag projectConfigOverrideReinstall
--solverSettingUpgradeDeps = fromFlag projectConfigUpgradeDeps
ProjectConfigShared {..} = defaults <> projectConfigShared
defaults = mempty {
projectConfigSolver = Flag defaultSolver,
projectConfigAllowOlder = Just (AllowOlder RelaxDepsNone),
projectConfigAllowNewer = Just (AllowNewer RelaxDepsNone),
projectConfigMaxBackjumps = Flag defaultMaxBackjumps,
projectConfigReorderGoals = Flag (ReorderGoals False),
projectConfigCountConflicts = Flag (CountConflicts True),
projectConfigStrongFlags = Flag (StrongFlags False)
--projectConfigIndependentGoals = Flag False,
--projectConfigShadowPkgs = Flag False,
--projectConfigReinstall = Flag False,
--projectConfigAvoidReinstalls = Flag False,
--projectConfigOverrideReinstall = Flag False,
--projectConfigUpgradeDeps = Flag False
}
-- | Resolve the project configuration, with all its optional fields, into
-- 'BuildTimeSettings' with no optional fields (by applying defaults).
--
resolveBuildTimeSettings :: Verbosity
-> CabalDirLayout
-> ProjectConfigShared
-> ProjectConfigBuildOnly
-> ProjectConfigBuildOnly
-> BuildTimeSettings
resolveBuildTimeSettings verbosity
CabalDirLayout {
cabalLogsDirectory
}
ProjectConfigShared {
projectConfigRemoteRepos,
projectConfigLocalRepos
}
fromProjectFile
fromCommandLine =
BuildTimeSettings {..}
where
buildSettingDryRun = fromFlag projectConfigDryRun
buildSettingOnlyDeps = fromFlag projectConfigOnlyDeps
buildSettingSummaryFile = fromNubList projectConfigSummaryFile
--buildSettingLogFile -- defined below, more complicated
--buildSettingLogVerbosity -- defined below, more complicated
buildSettingBuildReports = fromFlag projectConfigBuildReports
buildSettingSymlinkBinDir = flagToList projectConfigSymlinkBinDir
buildSettingOneShot = fromFlag projectConfigOneShot
buildSettingNumJobs = determineNumJobs projectConfigNumJobs
buildSettingKeepGoing = fromFlag projectConfigKeepGoing
buildSettingOfflineMode = fromFlag projectConfigOfflineMode
buildSettingKeepTempFiles = fromFlag projectConfigKeepTempFiles
buildSettingRemoteRepos = fromNubList projectConfigRemoteRepos
buildSettingLocalRepos = fromNubList projectConfigLocalRepos
buildSettingCacheDir = fromFlag projectConfigCacheDir
buildSettingHttpTransport = flagToMaybe projectConfigHttpTransport
buildSettingIgnoreExpiry = fromFlag projectConfigIgnoreExpiry
buildSettingReportPlanningFailure
= fromFlag projectConfigReportPlanningFailure
ProjectConfigBuildOnly{..} = defaults
<> fromProjectFile
<> fromCommandLine
defaults = mempty {
projectConfigDryRun = toFlag False,
projectConfigOnlyDeps = toFlag False,
projectConfigBuildReports = toFlag NoReports,
projectConfigReportPlanningFailure = toFlag False,
projectConfigKeepGoing = toFlag False,
projectConfigOneShot = toFlag False,
projectConfigOfflineMode = toFlag False,
projectConfigKeepTempFiles = toFlag False,
projectConfigIgnoreExpiry = toFlag False
}
-- The logging logic: what log file to use and what verbosity.
--
-- If the user has specified --remote-build-reporting=detailed, use the
-- default log file location. If the --build-log option is set, use the
-- provided location. Otherwise don't use logging, unless building in
-- parallel (in which case the default location is used).
--
buildSettingLogFile :: Maybe (Compiler -> Platform
-> PackageId -> UnitId -> FilePath)
buildSettingLogFile
| useDefaultTemplate = Just (substLogFileName defaultTemplate)
| otherwise = fmap substLogFileName givenTemplate
defaultTemplate = toPathTemplate $
cabalLogsDirectory </>
"$compiler" </> "$libname" <.> "log"
givenTemplate = flagToMaybe projectConfigLogFile
useDefaultTemplate
| buildSettingBuildReports == DetailedReports = True
| isJust givenTemplate = False
| isParallelBuild = True
| otherwise = False
isParallelBuild = buildSettingNumJobs >= 2
substLogFileName :: PathTemplate
-> Compiler -> Platform
-> PackageId -> UnitId -> FilePath
substLogFileName template compiler platform pkgid uid =
fromPathTemplate (substPathTemplate env template)
where
env = initialPathTemplateEnv
pkgid uid (compilerInfo compiler) platform
-- If the user has specified --remote-build-reporting=detailed or
-- --build-log, use more verbose logging.
--
buildSettingLogVerbosity
| overrideVerbosity = max verbose verbosity
| otherwise = verbosity
overrideVerbosity
| buildSettingBuildReports == DetailedReports = True
| isJust givenTemplate = True
| isParallelBuild = False
| otherwise = False
---------------------------------------------
-- Reading and writing project config files
--
-- | Find the root of this project.
--
-- Searches for an explicit @cabal.project@ file, in the current directory or
-- parent directories. If no project file is found then the current dir is the
-- project root (and the project will use an implicit config).
--
findProjectRoot :: IO FilePath
findProjectRoot = do
curdir <- getCurrentDirectory
homedir <- getHomeDirectory
-- Search upwards. If we get to the users home dir or the filesystem root,
-- then use the current dir
let probe dir | isDrive dir || dir == homedir
= return curdir -- implicit project root
probe dir = do
exists <- doesFileExist (dir </> "cabal.project")
if exists
then return dir -- explicit project root
else probe (takeDirectory dir)
probe curdir
--TODO: [nice to have] add compat support for old style sandboxes
-- | Read all the config relevant for a project. This includes the project
-- file if any, plus other global config.
--
readProjectConfig :: Verbosity -> FilePath -> Rebuild ProjectConfig
readProjectConfig verbosity projectRootDir = do
global <- readGlobalConfig verbosity
local <- readProjectLocalConfig verbosity projectRootDir
freeze <- readProjectLocalFreezeConfig verbosity projectRootDir
extra <- readProjectLocalExtraConfig verbosity projectRootDir
return (global <> local <> freeze <> extra)
-- | Reads an explicit @cabal.project@ file in the given project root dir,
-- or returns the default project config for an implicitly defined project.
--
readProjectLocalConfig :: Verbosity -> FilePath -> Rebuild ProjectConfig
readProjectLocalConfig verbosity projectRootDir = do
usesExplicitProjectRoot <- liftIO $ doesFileExist projectFile
if usesExplicitProjectRoot
then do
monitorFiles [monitorFileHashed projectFile]
addProjectFileProvenance <$> liftIO readProjectFile
else do
monitorFiles [monitorNonExistentFile projectFile]
return defaultImplicitProjectConfig
where
projectFile = projectRootDir </> "cabal.project"
readProjectFile =
reportParseResult verbosity "project file" projectFile
. parseProjectConfig
=<< readFile projectFile
addProjectFileProvenance config =
config {
projectConfigProvenance =
Set.insert (Explicit projectFile) (projectConfigProvenance config)
}
defaultImplicitProjectConfig :: ProjectConfig
defaultImplicitProjectConfig =
mempty {
-- We expect a package in the current directory.
projectPackages = [ "./*.cabal" ],
-- This is to automatically pick up deps that we unpack locally.
projectPackagesOptional = [ "./*/*.cabal" ],
projectConfigProvenance = Set.singleton Implicit
}
-- | Reads a @cabal.project.local@ file in the given project root dir,
-- or returns empty. This file gets written by @cabal configure@, or in
-- principle can be edited manually or by other tools.
--
readProjectLocalExtraConfig :: Verbosity -> FilePath -> Rebuild ProjectConfig
readProjectLocalExtraConfig verbosity =
readProjectExtensionFile verbosity "local"
"project local configuration file"
-- | Reads a @cabal.project.freeze@ file in the given project root dir,
-- or returns empty. This file gets written by @cabal freeze@, or in
-- principle can be edited manually or by other tools.
--
readProjectLocalFreezeConfig :: Verbosity -> FilePath -> Rebuild ProjectConfig
readProjectLocalFreezeConfig verbosity =
readProjectExtensionFile verbosity "freeze"
"project freeze file"
-- | Reads a named config file in the given project root dir, or returns empty.
--
readProjectExtensionFile :: Verbosity -> String -> FilePath
-> FilePath -> Rebuild ProjectConfig
readProjectExtensionFile verbosity extensionName extensionDescription
projectRootDir = do
exists <- liftIO $ doesFileExist extensionFile
if exists
then do monitorFiles [monitorFileHashed extensionFile]
liftIO readExtensionFile
else do monitorFiles [monitorNonExistentFile extensionFile]
return mempty
where
extensionFile = projectRootDir </> "cabal.project" <.> extensionName
readExtensionFile =
reportParseResult verbosity extensionDescription extensionFile
. parseProjectConfig
=<< readFile extensionFile
-- | Parse the 'ProjectConfig' format.
--
-- For the moment this is implemented in terms of parsers for legacy
-- configuration types, plus a conversion.
--
parseProjectConfig :: String -> ParseResult ProjectConfig
parseProjectConfig content =
convertLegacyProjectConfig <$>
parseLegacyProjectConfig content
-- | Render the 'ProjectConfig' format.
--
-- For the moment this is implemented in terms of a pretty printer for the
-- legacy configuration types, plus a conversion.
--
showProjectConfig :: ProjectConfig -> String
showProjectConfig =
showLegacyProjectConfig . convertToLegacyProjectConfig
-- | Write a @cabal.project.local@ file in the given project root dir.
--
writeProjectLocalExtraConfig :: FilePath -> ProjectConfig -> IO ()
writeProjectLocalExtraConfig projectRootDir =
writeProjectConfigFile projectExtraConfigFile
where
projectExtraConfigFile = projectRootDir </> "cabal.project.local"
-- | Write a @cabal.project.freeze@ file in the given project root dir.
--
writeProjectLocalFreezeConfig :: FilePath -> ProjectConfig -> IO ()
writeProjectLocalFreezeConfig projectRootDir =
writeProjectConfigFile projectFreezeConfigFile
where
projectFreezeConfigFile = projectRootDir </> "cabal.project.freeze"
-- | Write in the @cabal.project@ format to the given file.
--
writeProjectConfigFile :: FilePath -> ProjectConfig -> IO ()
writeProjectConfigFile file =
writeFile file . showProjectConfig
-- | Read the user's @~/.cabal/config@ file.
--
readGlobalConfig :: Verbosity -> Rebuild ProjectConfig
readGlobalConfig verbosity = do
config <- liftIO (loadConfig verbosity mempty)
configFile <- liftIO defaultConfigFile
monitorFiles [monitorFileHashed configFile]
return (convertLegacyGlobalConfig config)
--TODO: do this properly, there's several possible locations
-- and env vars, and flags for selecting the global config
reportParseResult :: Verbosity -> String -> FilePath -> ParseResult a -> IO a
reportParseResult verbosity _filetype filename (ParseOk warnings x) = do
unless (null warnings) $
let msg = unlines (map (showPWarning filename) warnings)
in warn verbosity msg
return x
reportParseResult _verbosity filetype filename (ParseFailed err) =
let (line, msg) = locatedErrorMsg err
in die $ "Error parsing " ++ filetype ++ " " ++ filename
++ maybe "" (\n -> ':' : show n) line ++ ":\n" ++ msg
---------------------------------------------
-- Reading packages in the project
--
-- | The location of a package as part of a project. Local file paths are
-- either absolute (if the user specified it as such) or they are relative
-- to the project root.
--
data ProjectPackageLocation =
ProjectPackageLocalCabalFile FilePath
| ProjectPackageLocalDirectory FilePath FilePath -- dir and .cabal file
| ProjectPackageLocalTarball FilePath
| ProjectPackageRemoteTarball URI
| ProjectPackageRemoteRepo SourceRepo
| ProjectPackageNamed Dependency
deriving Show
-- | Exception thrown by 'findProjectPackages'.
--
data BadPackageLocations
= BadPackageLocations (Set ProjectConfigProvenance) [BadPackageLocation]
#if MIN_VERSION_base(4,8,0)
deriving (Show, Typeable)
#else
deriving (Typeable)
instance Show BadPackageLocations where
show = renderBadPackageLocations
#endif
instance Exception BadPackageLocations where
#if MIN_VERSION_base(4,8,0)
displayException = renderBadPackageLocations
#endif
--TODO: [nice to have] custom exception subclass for Doc rendering, colour etc
data BadPackageLocation
= BadPackageLocationFile BadPackageLocationMatch
| BadLocGlobEmptyMatch String
| BadLocGlobBadMatches String [BadPackageLocationMatch]
| BadLocUnexpectedUriScheme String
| BadLocUnrecognisedUri String
| BadLocUnrecognised String
deriving Show
data BadPackageLocationMatch
= BadLocUnexpectedFile String
| BadLocNonexistantFile String
| BadLocDirNoCabalFile String
| BadLocDirManyCabalFiles String
deriving Show
renderBadPackageLocations :: BadPackageLocations -> String
renderBadPackageLocations (BadPackageLocations provenance bpls)
-- There is no provenance information,
-- render standard bad package error information.
| Set.null provenance = renderErrors renderBadPackageLocation
-- The configuration is implicit, render bad package locations
-- using possibly specialized error messages.
| Set.singleton Implicit == provenance =
renderErrors renderImplicitBadPackageLocation
-- The configuration contains both implicit and explicit provenance.
-- This should not occur, and a message is output to assist debugging.
| Implicit `Set.member` provenance =
"Warning: both implicit and explicit configuration is present."
++ renderExplicit
-- The configuration was read from one or more explicit path(s),
-- list the locations and render the bad package error information.
-- The intent is to supersede this with the relevant location information
-- per package error.
| otherwise = renderExplicit
where
renderErrors f = unlines (map f bpls)
renderExplicit =
"When using configuration(s) from "
++ intercalate ", " (mapMaybe getExplicit (Set.toList provenance))
++ ", the following errors occurred:\n"
++ renderErrors renderBadPackageLocation
getExplicit (Explicit path) = Just path
getExplicit Implicit = Nothing
--TODO: [nice to have] keep track of the config file (and src loc) packages
-- were listed, to use in error messages
-- | Render bad package location error information for the implicit
-- @cabal.project@ configuration.
--
-- TODO: This is currently not fully realized, with only one of the implicit
-- cases handled. More cases should be added with informative help text
-- about the issues related specifically when having no project configuration
-- is present.
renderImplicitBadPackageLocation :: BadPackageLocation -> String
renderImplicitBadPackageLocation bpl = case bpl of
BadLocGlobEmptyMatch pkglocstr ->
"No cabal.project file or cabal file matching the default glob '"
++ pkglocstr ++ "' was found.\n"
++ "Please create a package description file <pkgname>.cabal "
++ "or a cabal.project file referencing the packages you "
++ "want to build."
_ -> renderBadPackageLocation bpl
renderBadPackageLocation :: BadPackageLocation -> String
renderBadPackageLocation bpl = case bpl of
BadPackageLocationFile badmatch ->
renderBadPackageLocationMatch badmatch
BadLocGlobEmptyMatch pkglocstr ->
"The package location glob '" ++ pkglocstr
++ "' does not match any files or directories."
BadLocGlobBadMatches pkglocstr failures ->
"The package location glob '" ++ pkglocstr ++ "' does not match any "
++ "recognised forms of package. "
++ concatMap ((' ':) . renderBadPackageLocationMatch) failures
BadLocUnexpectedUriScheme pkglocstr ->
"The package location URI '" ++ pkglocstr ++ "' does not use a "
++ "supported URI scheme. The supported URI schemes are http, https and "
++ "file."
BadLocUnrecognisedUri pkglocstr ->
"The package location URI '" ++ pkglocstr ++ "' does not appear to "
++ "be a valid absolute URI."
BadLocUnrecognised pkglocstr ->
"The package location syntax '" ++ pkglocstr ++ "' is not recognised."
renderBadPackageLocationMatch :: BadPackageLocationMatch -> String
renderBadPackageLocationMatch bplm = case bplm of
BadLocUnexpectedFile pkglocstr ->
"The package location '" ++ pkglocstr ++ "' is not recognised. The "
++ "supported file targets are .cabal files, .tar.gz tarballs or package "
++ "directories (i.e. directories containing a .cabal file)."
BadLocNonexistantFile pkglocstr ->
"The package location '" ++ pkglocstr ++ "' does not exist."
BadLocDirNoCabalFile pkglocstr ->
"The package directory '" ++ pkglocstr ++ "' does not contain any "
++ ".cabal file."
BadLocDirManyCabalFiles pkglocstr ->
"The package directory '" ++ pkglocstr ++ "' contains multiple "
++ ".cabal files (which is not currently supported)."
-- | Given the project config,
--
-- Throws 'BadPackageLocations'.
--
findProjectPackages :: FilePath -> ProjectConfig
-> Rebuild [ProjectPackageLocation]
findProjectPackages projectRootDir ProjectConfig{..} = do
requiredPkgs <- findPackageLocations True projectPackages
optionalPkgs <- findPackageLocations False projectPackagesOptional
let repoPkgs = map ProjectPackageRemoteRepo projectPackagesRepo
namedPkgs = map ProjectPackageNamed projectPackagesNamed
return (concat [requiredPkgs, optionalPkgs, repoPkgs, namedPkgs])
where
findPackageLocations required pkglocstr = do
(problems, pkglocs) <-
partitionEithers <$> mapM (findPackageLocation required) pkglocstr
unless (null problems) $
liftIO $ throwIO $ BadPackageLocations projectConfigProvenance problems
return (concat pkglocs)
findPackageLocation :: Bool -> String
-> Rebuild (Either BadPackageLocation
[ProjectPackageLocation])
findPackageLocation _required@True pkglocstr =
-- strategy: try first as a file:// or http(s):// URL.
-- then as a file glob (usually encompassing single file)
-- finally as a single file, for files that fail to parse as globs
checkIsUriPackage pkglocstr
`mplusMaybeT` checkIsFileGlobPackage pkglocstr
`mplusMaybeT` checkIsSingleFilePackage pkglocstr
>>= maybe (return (Left (BadLocUnrecognised pkglocstr))) return
findPackageLocation _required@False pkglocstr = do
-- just globs for optional case
res <- checkIsFileGlobPackage pkglocstr
case res of
Nothing -> return (Left (BadLocUnrecognised pkglocstr))
Just (Left _) -> return (Right []) -- it's optional
Just (Right pkglocs) -> return (Right pkglocs)
checkIsUriPackage, checkIsFileGlobPackage, checkIsSingleFilePackage
:: String -> Rebuild (Maybe (Either BadPackageLocation
[ProjectPackageLocation]))
checkIsUriPackage pkglocstr =
return $!
case parseAbsoluteURI pkglocstr of
Just uri@URI {
uriScheme = scheme,
uriAuthority = Just URIAuth { uriRegName = host }
}
| recognisedScheme && not (null host) ->
Just (Right [ProjectPackageRemoteTarball uri])
--TODO: [required eventually] handle file: urls which do have a null
-- host. translate URI into filepath and use ProjectPackageLocalTarball
-- or keep as file url and use ProjectPackageRemoteTarball?
| not recognisedScheme && not (null host) ->
Just (Left (BadLocUnexpectedUriScheme pkglocstr))
| recognisedScheme && null host ->
Just (Left (BadLocUnrecognisedUri pkglocstr))
where
recognisedScheme = scheme == "http:" || scheme == "https:"
|| scheme == "file:"
_ -> Nothing
checkIsFileGlobPackage pkglocstr =
case simpleParse pkglocstr of
Nothing -> return Nothing
Just glob -> liftM Just $ do
matches <- matchFileGlob glob
case matches of
[] | isJust (isTrivialFilePathGlob glob)
-> return (Left (BadPackageLocationFile
(BadLocNonexistantFile pkglocstr)))
[] -> return (Left (BadLocGlobEmptyMatch pkglocstr))
_ -> do
(failures, pkglocs) <- partitionEithers <$>
mapM checkFilePackageMatch matches
return $! case (failures, pkglocs) of
([failure], []) | isJust (isTrivialFilePathGlob glob)
-> Left (BadPackageLocationFile failure)
(_, []) -> Left (BadLocGlobBadMatches pkglocstr failures)
_ -> Right pkglocs
checkIsSingleFilePackage pkglocstr = do
let filename = projectRootDir </> pkglocstr
isFile <- liftIO $ doesFileExist filename
isDir <- liftIO $ doesDirectoryExist filename
if isFile || isDir
then checkFilePackageMatch pkglocstr
>>= either (return . Just . Left . BadPackageLocationFile)
(return . Just . Right . (\x->[x]))
else return Nothing
checkFilePackageMatch :: String -> Rebuild (Either BadPackageLocationMatch
ProjectPackageLocation)
checkFilePackageMatch pkglocstr = do
-- The pkglocstr may be absolute or may be relative to the project root.
-- Either way, </> does the right thing here. We return relative paths if
-- they were relative in the first place.
let abspath = projectRootDir </> pkglocstr
isFile <- liftIO $ doesFileExist abspath
isDir <- liftIO $ doesDirectoryExist abspath
parentDirExists <- case takeDirectory abspath of
[] -> return False
dir -> liftIO $ doesDirectoryExist dir
case () of
_ | isDir
-> do matches <- matchFileGlob (globStarDotCabal pkglocstr)
case matches of
[cabalFile]
-> return (Right (ProjectPackageLocalDirectory
pkglocstr cabalFile))
[] -> return (Left (BadLocDirNoCabalFile pkglocstr))
_ -> return (Left (BadLocDirManyCabalFiles pkglocstr))
| extensionIsTarGz pkglocstr
-> return (Right (ProjectPackageLocalTarball pkglocstr))
| takeExtension pkglocstr == ".cabal"
-> return (Right (ProjectPackageLocalCabalFile pkglocstr))
| isFile
-> return (Left (BadLocUnexpectedFile pkglocstr))
| parentDirExists
-> return (Left (BadLocNonexistantFile pkglocstr))
| otherwise
-> return (Left (BadLocUnexpectedFile pkglocstr))
extensionIsTarGz f = takeExtension f == ".gz"
&& takeExtension (dropExtension f) == ".tar"
-- | A glob to find all the cabal files in a directory.
--
-- For a directory @some/dir/@, this is a glob of the form @some/dir/\*.cabal@.
-- The directory part can be either absolute or relative.
--
globStarDotCabal :: FilePath -> FilePathGlob
globStarDotCabal dir =
FilePathGlob
(if isAbsolute dir then FilePathRoot root else FilePathRelative)
(foldr (\d -> GlobDir [Literal d])
(GlobFile [WildCard, Literal ".cabal"]) dirComponents)
where
(root, dirComponents) = fmap splitDirectories (splitDrive dir)
--TODO: [code cleanup] use sufficiently recent transformers package
mplusMaybeT :: Monad m => m (Maybe a) -> m (Maybe a) -> m (Maybe a)
mplusMaybeT ma mb = do
mx <- ma
case mx of
Nothing -> mb
Just x -> return (Just x)
-- | Read the @.cabal@ file of the given package.
--
-- Note here is where we convert from project-root relative paths to absolute
-- paths.
--
readSourcePackage :: Verbosity -> ProjectPackageLocation
-> Rebuild UnresolvedSourcePackage
readSourcePackage verbosity (ProjectPackageLocalCabalFile cabalFile) =
readSourcePackage verbosity (ProjectPackageLocalDirectory dir cabalFile)
where
dir = takeDirectory cabalFile
readSourcePackage verbosity (ProjectPackageLocalDirectory dir cabalFile) = do
monitorFiles [monitorFileHashed cabalFile]
root <- askRoot
pkgdesc <- liftIO $ readPackageDescription verbosity (root </> cabalFile)
return SourcePackage {
packageInfoId = packageId pkgdesc,
packageDescription = pkgdesc,
packageSource = LocalUnpackedPackage (root </> dir),
packageDescrOverride = Nothing
}
readSourcePackage _verbosity _ =
fail $ "TODO: add support for fetching and reading local tarballs, remote "
++ "tarballs, remote repos and passing named packages through"
---------------------------------------------
-- Checking configuration sanity
--
data BadPerPackageCompilerPaths
= BadPerPackageCompilerPaths [(PackageName, String)]
#if MIN_VERSION_base(4,8,0)
deriving (Show, Typeable)
#else
deriving (Typeable)
instance Show BadPerPackageCompilerPaths where
show = renderBadPerPackageCompilerPaths
#endif
instance Exception BadPerPackageCompilerPaths where
#if MIN_VERSION_base(4,8,0)
displayException = renderBadPerPackageCompilerPaths
#endif
--TODO: [nice to have] custom exception subclass for Doc rendering, colour etc
renderBadPerPackageCompilerPaths :: BadPerPackageCompilerPaths -> String
renderBadPerPackageCompilerPaths
(BadPerPackageCompilerPaths ((pkgname, progname) : _)) =
"The path to the compiler program (or programs used by the compiler) "
++ "cannot be specified on a per-package basis in the cabal.project file "
++ "(i.e. setting the '" ++ progname ++ "-location' for package '"
++ display pkgname ++ "'). All packages have to use the same compiler, so "
++ "specify the path in a global 'program-locations' section."
--TODO: [nice to have] better format control so we can pretty-print the
-- offending part of the project file. Currently the line wrapping breaks any
-- formatting.
renderBadPerPackageCompilerPaths _ = error "renderBadPerPackageCompilerPaths"
-- | The project configuration is not allowed to specify program locations for
-- programs used by the compiler as these have to be the same for each set of
-- packages.
--
-- We cannot check this until we know which programs the compiler uses, which
-- in principle is not until we've configured the compiler.
--
-- Throws 'BadPerPackageCompilerPaths'
--
checkBadPerPackageCompilerPaths :: [ConfiguredProgram]
-> Map PackageName PackageConfig
-> IO ()
checkBadPerPackageCompilerPaths compilerPrograms packagesConfig =
case [ (pkgname, progname)
| let compProgNames = Set.fromList (map programId compilerPrograms)
, (pkgname, pkgconf) <- Map.toList packagesConfig
, progname <- Map.keys (getMapLast (packageConfigProgramPaths pkgconf))
, progname `Set.member` compProgNames ] of
[] -> return ()
ps -> throwIO (BadPerPackageCompilerPaths ps)